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NB/T 47025-2012Spiral wound gaskets (English PDF)

缠绕垫片

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Issued by

NEA

Level / Type

Industry · Recommended

Issue date

November 9, 2012

Implementation date

March 1, 2013

Scope

NB/T 47025-2012 is the English-translated version of 缠绕垫片.

NB/T 47025-2012 is the Chinese standard "Spiral wound gaskets". Its scope clause reads: This standard specifies the dimension and technical requirements of spiral wound gaskets for pressure vessel flanges.

This standard is applicable to spiral wound gaskets for the "B-type Socket-weld Flange" (NB/T 47022) and "Welding Neck Flange" (NB/T 47023). Note: the use of materials containing asbestos shall comply with requirements of related laws and regulations.

During the production and use of gaskets containing asbestos, protective measures shall be taken to avoid any personal health hazard.

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Document preview — NB/T 47025-2012

National Standard of the People's Republic of China

ICS: 21.060.30
Replacing: JB/T 4705-2000

Issued by: National Energy Administration of the People's Republic of China

Foreword
1 Scope
2 Normative References
3 Code, Designation and Designation Example
4 Structural Type and Dimension
5 Limit Deviation of Gasket Dimension
6 Other Technical Requirements for Gaskets

1 Scope

This standard specifies the dimension and technical requirements of spiral wound gaskets for pressure vessel flanges.

This standard is applicable to spiral wound gaskets for the "B-type Socket-weld Flange" (NB/T 47022) and "Welding Neck Flange" (NB/T 47023).

Note: the use of materials containing asbestos shall comply with requirements of related laws and regulations. During the production and use of gaskets containing asbestos, protective measures shall be taken to avoid any personal health hazard.

2 Normative References

The following documents are indispensable for the application of this document. For dated references, only the dated edition applies. For undated references, the latest edition (including all the amendments) of the normative document applies.

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This preview omits tables, figures, formulas and parts of the technical clauses. The complete document — 15 pages — is available in the English PDF.

Referenced standards

Normative references

JC/T 69

Cited by

Similar standards

GB/T 14180-2026|GB/T 4622.1-2022|GB/T 4622.2-2022|GB/T 47919-2026|GB/T 34241-2017

Editions of NB/T 47025

Edition	Title	Revision	Status
NB/T 47025-2012	Spiral wound gaskets	current edition	Current
JB/T 4705-2000	Spiral wound gaskets	previous edition	Superseded

This page sells the current edition, NB/T 47025-2012. Earlier editions are listed for reference only.

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